Question

UUU Phelncc

UCUY
UUA Leu
CAU His
A strand of mRNA has the bases adenine-cytosine-uracil. Which amino acid
corresponds to these bases?
Messenger
Second base in codon
RNA Codons U IcA
UAU
LUGU
UUC)
UAC) TYT JUGC Cys
UCA
UAA Stop
UUG UCG UAG Stop UGG Trp
CUU CCU
CGU
CUC CCC
CAC)
ICGC
Pro
CUA CCA
CGA
CUG) CCG) CAG) CGG
AUU
ACU 1
AUC lle
ACC
ААС, AGC)
Thr
AUA
ACA
AAA
AGA 1
AUGStart Me ACG
AAG
AGGS
GUU
GCU
GAU GGU
GUC
GCC
GAC) GGC
) Val
GUA GCA GAA GGA
GUGI GCG GAGS GGG
0
Let
CAA
First base in codon
Gold
Third base in codon
AAU Asn
F Ala
GIU
GCAL
O A. Lys
O B. Ser
OC. Asn
O D. Thr

Answer 1

Answer: D. Thr

Explanation: The bases Adenine- Cytosine-Uracil present in the mRNA strand can be written as ACU. From the above diagram, there are four codons that codes for threonine and they are ACU, ACC, ACA and ACG. Thr is the abbreviation for the amino acid Threonine.